Screen.



PATENTED APR. 2, 1907.

P. MIKESELL, IR.

SCREEN APPLICATION FILED MAY 29, 1906.

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' UNITED STATES PATENT orrron.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed May 29, 1906 Serial No. 319,356.

To all whom it may concern:

Be it known that I, FRANK MrKEsELL, J r., a citizen of the United States, residing at Fort Scott, in the county of Bourbon and State of Kansas, have invented new and use ful Improvements in Screens, of which the following is a specification.

This invention relates to dry pan-screens, such as are used in all concentrating Inachines and processes, the object of the present invention being to provide a sectional screen for the purpose cited in which that portion of the screen which is subjected to the greatest stress and wear and tear is made detachable from the major portion of the screen, adapting a new section to be substituted in the place of the injured and useless section as frequently as may be necessary,

thus reducing the necessity of substituting an entire new screen and correspondingly reducing the expense of maintenance of the machine or plant.

With the above and other objects in view the invention consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a plan view of a dry screen embodying the present invention, showing the sections thereof separated and moved slightly apart. Figs. 2 and 3 are enlarged sectional views showing the coupling means between the sections of the screens.

The screen illustrated in Fig. 1 is of the well-known conventional form, comprising a frame embodying the outer arcuate bar 1, the inner bar 2, and the converging side bars 3. The side bars 3 are ordinarily integral or formed continuously from the outer bar 1 to the inner bar 2 and are connected by inclined slats 4.

In carrying out the present invention the side bars 3 are cut into at opposite points, the out being of zigzag form, somewhat resembling the capital letter 2, whereby each section of each side bar is provided with a projecting tenon 5 and a corresponding mortise 6. Therefore when the two parts of each side bar are brought together the tenons thereof fit into the respective mortises, as clearly indicated in Fig. 1, thus preventing any relative lateral movement between the screen-sections.

In order to prevent the screen-sections from moving away from each other, I provide couplings at opposite sides of the screen adjacent to the side bars 3, each of said couplings comprising a socket member 7, which is secured rigidly to the main or larger screensection, and a tongue member 8, which is rigidly secured to the smaller screen-section, the tongue member comprising an inwardlyprojecting tongue 9, which fits into a corresponding recess 10 in the socket member 7. Both the upper and lower surfaces of the tongue 9 are beveled at a corresponding inclination, as shown in Figs. 2 and 3, while the corresponding surfaces of the recesses in the socket member are correspondingly beveled. This is done in order to enable the two parts of the coupling to be associated by deflecting the sections of the screen relatively to each other and bringing the same together on an angle, after which by moving the screen-sections into alinement with each other the contacting inclined faces of the tongue and recess are brought into close relationship to each other, causing them to interlock to prevent separation between the screen-sections. By reference to the righthand end of Fig. 3 it will further be noted that where the side bar is cut in two the cut is formed on a bevel, and therefore when the two parts of the screen have been put together on an angle and straightened rela tively to each other the said inclined surfaces forined by the inclined cut bind against each other and prevent the screen-sections from moving relatively to each other in any direction. This forms a thorough and effective interlocked j oint'between the screen-sections without requiring the use of any special fastening or clamping devices.

From the foregoing description it will be seen that when the screen-sections are in their proper working relation an effective interlocked joint is provided between said sections, whereby they are firmly held against relative movement without the aid of screws,

clamps, or other extraneous fastening devices. Whenever the smaller portion of the screen becomes broken or injured and rendered unfit for further use, the smaller section may be detached from the larger section by rocking the smaller section at an angle to the larger section, thereby releasing the interlocking and interfitting shoulders provided by the side bars and coupling devices hereinabove described. If desired, the

the other section of the screen provided with a projecting tongue to fit within said socket whereby said screen-sections are rendered separable, as described.

In testimony whereof I afliX my signature in presence of two Witnesses.

FRANK MIKESELL, J R.

Witnesses:

D. F. CAMPBELL, B. F. MIKESELL. 

